Home / 423,900-640,170

Finding the Third Proportional to 423,900 and 640,170

Calculator

Solution

The third proportional to 423,900 and 640,170 is: 966,779.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,900 : 640,170 = 640,170 : x
  2. Step 2: Convert to fraction form
    423,900/640,170 = 640,170/x
  3. Step 3: Cross multiply
    423,900x = 640,170 × 640,170
  4. Step 4: Simplify right side
    423,900x = 409,817,628,900
  5. Step 5: Solve for x
    x = 409,817,628,900/423,900
  6. Step 6: Final answer
    x = 966,779.03

Related Problems

Find third proportional to 211,950 and 320,085
Half scale
Find third proportional to 847,800 and 1,280,340
Double scale
Find third proportional to 423,902 and 640,173
Similar ratio
Find third proportional to 635,850 and 960,255
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.